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kernel: Add legacy compatibility fallback

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ShirkNeko
2025-11-15 11:05:50 +08:00
parent 0c9ebb9bad
commit 011a740217
1 changed files with 18 additions and 1 deletions
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19
kernel/setuid_hook.c
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@@ -256,6 +256,7 @@ int ksu_handle_setresuid(uid_t ruid, uid_t euid, uid_t suid){
// - Since ksu maanger app uid is excluded in allow_list_arr, so ksu_uid_should_umount(manager_uid)
// will always return true, that's why we need to explicitly check if new_uid belongs to
// ksu manager
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 10, 0)
if (ksu_get_manager_uid() == new_uid % 100000) {
pr_info("install fd for manager: %d\n", new_uid);
ksu_install_fd();
@@ -264,6 +265,21 @@ int ksu_handle_setresuid(uid_t ruid, uid_t euid, uid_t suid){
spin_unlock_irq(&current->sighand->siglock);
return 0;
}
#else
if (ksu_is_allow_uid_for_current(new_uid)) {
spin_lock_irq(&current->sighand->siglock);
disable_seccomp();
spin_unlock_irq(&current->sighand->siglock);
if (ksu_get_manager_uid() == new_uid) {
pr_info("install fd for ksu manager(uid=%d)\n",
new_uid);
ksu_install_fd();
}
return 0;
}
#endif
// Check if spawned process is normal user app and needs to be umounted
if (likely(is_zygote_normal_app_uid(new_uid) && ksu_uid_should_umount(new_uid))) {
@@ -274,7 +290,7 @@ int ksu_handle_setresuid(uid_t ruid, uid_t euid, uid_t suid){
if (unlikely(is_some_system_uid(new_uid) && susfs_is_umount_for_zygote_system_process_enabled)) {
goto do_umount;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 10, 0)
if (ksu_is_allow_uid_for_current(new_uid)) {
if (current->seccomp.mode == SECCOMP_MODE_FILTER &&
current->seccomp.filter) {
@@ -283,6 +299,7 @@ int ksu_handle_setresuid(uid_t ruid, uid_t euid, uid_t suid){
spin_unlock_irq(&current->sighand->siglock);
}
}
#endif
return 0;